The article - here - by Casey Burchby, makes the case that Deighton's works have stood the test of time, as we near the fiftieth anniversary of The Ipcress File next year in 2002. I think Casey's opening analysis of Len's position in the literary world is pretty accurate:
"For many of us, Len Deighton may be a shadowy name at best. His best-sellerdom, though it lasted decades, is now a memory. (His most recent novel was published in 1996.) Yet Deighton is one of the best writers of the second half of the 20th century, being a master of spy fiction as well as a major contributor to the literature of World War II in fictional and nonfictional forms."Well worth a read.